Question 184144
Using the eliminations method, solve.
4x - 2y + 8z = 6
2x - y + 4z =  5
6x - 3y +12z = 7
:
There is no solution here, see what happens when we multiply the last eq by -1:
4x - 2y + 8z = 6
2x - y + 4z =  5
-6x +3y -12z = -7
-------------------- adding eliminates all the varibles